<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../../vue.js"></script>
    <style>
        [cloak] {
            display: none;
        }
    </style>
</head>

<body>
    <div id="app">
       
       <h2 v-cloak>用户名:{{username}}</h2>
       
    </div>
    <script>
        Vue.config.productionTip = false;
        
        const vm = new Vue({
            el: "#app",
            data() {
                return {
                    username: "laoli",
                }
            }
        })
</script>
</body>

</html>